1. Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565‑0871, Japan
2. Department of Innovative Oncology Research and Regenerative Medicine, Osaka International Cancer Institute, Osaka 541‑8567, Japan
3. Department of Surgery, Osaka Rosai Hospital, Sakai, Osaka 591‑8025, Japan
4. Department of Gastroenterological Surgery, Osaka General Medical Center, Osaka 558‑8588, Japan